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HVDC Macrogrid Modeling for power-flow and Transient Stability Studies in North American Continental-level Interconnections

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CSEE Journal of power and Energy Systems 2017年第4期3卷 390-398页

作者： Marcelo A.Elizondo Nihal Mohan James O’Brien Qiuhua Huang David Orser Warren Hess Hilary Brown Wenchun Zhu Divya Chandrashekhara Yuri V.Makarov Dale Osborn James Feltes Harold Kirkham David Duebner Zhenyu Huang Pacific Northwest National Laboratory RichlandWA 99354USA Midcontinent Independent System Operator EaganMN 55121USA Siemens PTI SchenectadyNY 12305USA

voltage direct current(HVDC)transmission lines are being constructed throughout the world,aided by advancements in power electronics and the potential value to transfer power between distant areas and off-shore *** HVDC lines within and across large AC interconnections could bring about economic benefits such as interregional capacity exchange and transfer of low-cost,distant electric energy directly to load *** addition,network configuration of HVDC lines could result in additional benefits that have not been deeply *** paper describes the modeling process for continentallevel power system interconnections with the addition of multiple HVDC lines configured as a *** models used for study are based on industry-accepted power-flow and dynamic system models for the North American Eastern and Western *** model provides insight on feasibility and initial steady-state and stability tests of the HVDC macrogrid and its interactions with the existing electricity infrastructure,opening the door to analysis of the technical value of such a macrogrid.

关键词： HVDC models HVDC transmission modeling power-flow power system dynamic stability power system planning

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Research and application of a power-flow-calculation method in multiterminal VSC-HVDC power grid

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Global Energy Interconnection 2019年第1期2卷 37-44页

作者： Linlin Wu Xiaowei Fan Man Xu Zhendong Li Xiao Wang Xiaofei Zhang Haiwang Jin State Grid Jibei Electric power Co.Ltd.Research Institute State Grid Jibei Electricity power Maintenance Company

For demonstrating a multiterminal voltage-source converter(VSC)-based high-voltage DC(HVDC)(VSCHVDC) project, this study puts forward a technical route for calculating the power flow in a 500-kV VSC-HVDC power grid in comparison with that of an AC power grid. The Jacobian matrix used in the power-flow calculation was deduced through methods such as Newton–Laphson iteration and Taylor series expansion. Further, the operation effect of powerflow calculation on a true bipolar VSC-HVDC power grid was analyzed briefly. The elements of the Jacobian matrix corresponding to VSC were studied under the mode of droop control and the control strategy of VSC-HVDC power grid was analyzed in detail. The power-flow calculation model for VSC-HVDC power grid of the master–slave control mode was simplified using the PQ decomposition method of the power-flow calculation of an AC power grid. Moreover, a four-terminal model of the Zhangbei VSC-HVDC demonstration project was established and tested on MATLAB. The simulation results under two kinds of operating conditions were analyzed and compared to the results of BPA; the deviation between the power-flow results was studied. The results show that the proposed calculation method can provide a feasible support for calculating the power flow in VSC-HVDC grids.

关键词： VSC-HVDC grids power-flow calculation Jacobian matrix Droop control

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